News

  1. Health & Medicine

    Retina Rescue: Adult stem cells form blood vessels in the eye

    Stem cells derived from bone marrow can grow into new blood vessels in the eyes of mice, suggesting a way to treat eye diseases in people.

    By Nathan Seppa
  2. Astronomy

    Icy Split: Comet fragments into 19 pieces

    A comet has split into 19 fragments strung out along a million-kilometer-long chain.

    By Ron Cowen
  3. Humans

    Terrorism Repercussions: Scientists consider threats, opportunities after Sept. 11

    A new report from the American Association for the Advancement of Science considers the potential effects on academic research of government policies proposed in response to the terrorism attack of Sept.